Exxonmobil Chemical Patents Inc.

Exxon Chemical Patents, Inc.

Exxonmobil Research and Engineering Company

Timothy Daniel Shaffer

David Yen-Lung Chung

Robert Norman Webb

Scott Thomas Milner

Michael Francis McDonald

Kevin Richard Squire

Jo Ann Marie Canich

Michael Gerard Matturro

Jo Ann Canich

Phillip Thomas Matsunaga

George Alan Vaughan

David Edward Gindelberger

James Richardson Lattner

Abhimanyu Onkar Patil

John Scott Buchanan

Stephen Zushma

Hsien-Chang Wang

Anthony Jay Dias

Sunny Jacob

Jay L Reimers

Enock Berluche

John F Walzer, Jr

Smita Kacker

Anastasios I Skoulidas

Pamela Jean Wright

Michael F McDonald, Jr

Joel Edward Schmieg

Krishnan Sankaranarayanan

Milind Ajinkya

Myron Bernard Kurtzman

Ralph Howard Schatz

Stephen M Wood

John A Clark

Yuan-Ju (Ray) Chen

Ira David Finkelstein

Adam H Scott

Michael F Mcdonald

Scott T Milner

Richard E Baud

Jean-Pierre Courseaux

This invention relates to a brominated elastomer composition comprising a free radical scavenger. The scavenger is present in the amount of at least about 0.05 wt % of the composition. The scavenger is added to the composition so that the Mooney viscosity of the composition does not increase by more than about 15% to about 40%, for up to about 15 days at 80&#xb0; C. The scavenger can be a sterically hindered nitroxyl ether, a nitroxyl radical, or both.

Mooney viscosity stable brominated elastomers

The present invention relates to a method for preparing olefin comonomers from ethylene. The comonomer generated can be used in a subsequent process, such as a polyethylene polymerization reactor. The comonomer generated can be transported, optionally without isolation or storage, to a polyethylene polymerization reactor. One method includes the steps of: feeding ethylene and a catalyst in a solvent/diluent to one or more comonomer synthesis reactors; reacting the ethylene and the catalyst under reaction conditions sufficient to produce an effluent comprising a desired comonomer; forming a gas stream comprising unreacted ethylene, and a liquid/bottoms stream comprising the comonomer, optionally by passing the effluent to one or more downstream gas/liquid phase separators; and purifying at least a portion of said liquid/bottoms stream by removing at least one of solid polymer, catalyst, and undesirable olefins therefrom.

Process for generating alpha olefin comonomers

The invention relates to new polymerization processes using hydrofluorocarbons to produce polymers. In particular, the invention relates to new polymerization processes using turbulent flow reactor systems using diluents including one or more hydrofluorocarbon(s) to produce polymers.

Reactor systems for use in polymerization processes

The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent.

Polymerization processes

The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers substantially free of long chain branching. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, substantially free of long chain branching.

Polymers substantially free of long chain branching

The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel halogenated polymers with new sequence distributions. In particular, the invention relates to halogenated copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, with new sequence distributions.

Halogenated polymers with new sequence distributions

The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and an alkylstyrene, preferably methylstyrene, even more preferably para-methylstyrene, with new sequence distributions. The copolymer may optionally be halogenated.

Polymers with new sequence distributions

The invention provides for polymerization processes to produce polymers utilizing boiling pool reactor systems and diluents including hydrofluorocarbons.

The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, with new sequence distributions.

The invention relates to new processes to produce polymers utilizing bayonette cooled slurry reactor systems and diluents including hydrofluorocarbons.

Substantially random ethylene and/or &#x3b1;-olefin copolymers containing units derived from vicinally disubstituted olefin monomers are described. The vicinally disubstituted olefin monomers may be represented by the generic formula (R)CH&#x2550;CH(R), where Rand Rindependently comprise hydrocarbyl or silyl-hydrocarbyl groups containing 1 or more carbon atoms, or may be linear, branched or cyclic substituted or unsubstituted hydrocarbyl groups having from 1-100 carbon atoms, or they may contain 30 or less carbon atoms. The copolymers may be prepared by coordination polymerization by means of contacting at least one vicinally disubstituted olefin monomer and ethylene and/or &#x3b1;-olefin, optionally with one or more other coordination polymerizable monomers, with a catalyst system comprising a monocyclopentadienyl heteroatom-containing Group 4 transition metal catalyst component.

Copolymers of ethylene and/or &#x3b1;-olefins and vicinally disubstituted olefins

A process for producing a linear &agr;-olefin which comprises: reacting a stoichiometric excess of a terminal C olefin with ethylene in the presence of an organometallic catalyst to produce a C linear &agr;-olefin, wherein the catalyst is capable of producing a Schulz-Flory distribution of the linear &agr;-olefin with a Schulz-Flory constant of less than about 0.8 and wherein n is an integer between about 3 to 20.

Selective coupling of terminal olefins with ethylene to manufacture linear &agr;-olefins

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Hackettstown, NJ, United States of America

Timothy Daniel Shaffer